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Finding the Fourth Proportional to 52,809.36, 79,224.03 and 21,221.88

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Solution

The fourth proportional to 52,809.36, 79,224.03 and 21,221.88 is: 31,836.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,809.36 : 79,224.03 = 21,221.88 : x
  2. Step 2: Convert to fraction form
    52,809.36/79,224.03 = 21,221.88/x
  3. Step 3: Cross multiply
    52,809.36x = 79,224.03 × 21,221.88
  4. Step 4: Simplify right side
    52,809.36x = 1,681,282,857.78
  5. Step 5: Solve for x
    x = 1,681,282,857.78/52,809.36
  6. Step 6: Final answer
    x = 31,836.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.